The feeling of pressure and swelling at the back of the head may be caused by cervical spondylosis and insufficient blood supply to the brain. 1. Cervical spondylosis: patients with cervical spondylosis may suffer from deformation of the cervical vertebrae due to prolonged bowing of the head and neck, head and neck trauma, excessive pillows and other causes, and tension of the neck and shoulder muscles, which may lead to a feeling of oppression and stuffiness at the back of the head, dizziness, insomnia and other symptoms. Symptoms can be relieved by improving the lifestyle and relaxing the shoulder and neck muscles and can be treated with medication and surgery under the instruction of the doctor if necessary. 2. Insufficient blood supply to the brain: When the blood supply to the brain is insufficient, the patient may experience dizziness, lightheadedness, headache, heavy pressure on the back of the head, stuffiness and swelling, etc. This may be related to factors such as unstable blood pressure and blood sugar, poor sleep quality, etc. It is recommended that the patient go to the hospital in time for a clear diagnosis and timely treatment. Patients with heavy pressure and swelling in the back of the head should go to the hospital in time to confirm the diagnosis and standardize the treatment under the guidance of the doctor, and it is recommended that the patient should maintain a positive mindset, ensure adequate sleep, relieve stress and improve bad habits.